something like a long-term weather forecast could lead to declining to issue an insurance policy for someone's home or automobile in an area. it could significantly impact the price. make it publicly available, and an insurance company could use that prediction. clearly an unacceptable risk
I have a project which uses weather info to predict avalanche risk. Reading the articles its hard for me to understand whether this would apply or not but my feeling is it might (If I ever need to run this in the EU I would talk to a lawyer).
https://openavalancheproject.org